<template>
  <div class="wrapper" ref="wrapper">
    <ul class="content">
      <li class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{ this.currentCity }}</div>
          </div>
        </div>
      </li>
      <li class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div
            class="button-wrapper"
            v-for="item in hot"
            :key="item.id"
            @click="handleCityClick(item.name)"
          >
            <div class="button">{{ item.name }}</div>
          </div>
        </div>
      </li>
      <li class="area" v-for="(item, key) in cities" :key="key" :ref="key">
        <div class="title border-topbottom">{{ key }}</div>
        <ul class="item-list">
          <li
            class="item border-bottom"
            v-for="innerItem in item"
            :key="innerItem.id"
            @click="handleCityClick(innerItem.name)"
          >
            {{ innerItem.name }}
          </li>
        </ul>
      </li>
    </ul>
  </div>
</template>

<script>
import Bscroll from "better-scroll";
import { mapState, mapMutations } from "vuex";
export default {
  name: "CityList",
  mounted() {
    this.$nextTick(() => {
      if (!this.scroll) {
        this.scroll = new Bscroll(this.$refs.wrapper);
      }
    });
  },
  computed: {
    ...mapState({
      currentCity: "city",
    }),
  },
  props: {
    hot: Array,
    cities: Object,
    letter: String,
  },
  methods: {
    handleCityClick(city) {
      // this.$store.dispatch("changeCity", city);
      // this.$store.commit("changeCity", city);
      this.changeCity(city);
      this.$router.push("/");
    },
    ...mapMutations(["changeCity"]),
  },
  watch: {
    letter() {
      if (this.letter) {
        const element = this.$refs[this.letter][0];
        this.scroll.scrollToElement(element);
      }
    },
  },
};
</script>

<style lang="stylus">
.border-topbottom {
  &:before {
    border-color: #ccc;
  }

  &:after {
    border-color: #ccc;
  }
}

.border-bottom {
  &:before {
    border-color: #ccc;
  }
}

.wrapper {
  overflow: hidden;
  position: absolute;
  top: 1.58rem;
  left: 0;
  right: 0;
  bottom: 0;

  .title {
    background-color: #eee;
    line-height: 0.44rem;
    padding-left: 0.2rem;
    font-size: 0.26rem;
    color: #666;
  }

  .button-list {
    overflow: hidden;
    padding: 0.1rem 0.6rem 0.1rem 0.1rem;

    .button-wrapper {
      float: left;
      width: 33.33%;

      .button {
        margin: 0.1rem;
        padding: 0.06rem 0;
        text-align: center;
        border: 0.02rem solid #ccc;
        border-radius: 0.06rem;
      }
    }
  }

  .item-list {
    .item {
      padding-left: 0.2rem;
      color: #666;
      line-height: 0.76rem;
    }
  }
}
</style>